January 2020
Intermediate to advanced
356 pages
6h 4m
Chinese
Content preview from Swift游戏开发经典实例
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
2D
图形和
Sprite Kit
｜
215
通过视差滚动来模拟出立体感是一种重要但相对简单的技术，我们在使用时
有些地方仍然需要注意。写到这一节时，我正坐在车后排在路上兜风，在测
试这段代码时忍不住要有一种要吐的感觉。
在游戏中，“晕车”也叫作“模拟晕动症”，在这个世界上仍然有许多玩家
会犯这种病。如果你的游戏中使用了模拟立体技术（无论是
3D
还是
2D
游戏，
只要你模拟了立体感），那么你需要在玩家中尽量多地进行测试。
6.20
噪声图
问题
我们想生成一种类似天然纹理的图片，看起来就像是由一些杂乱无章的斑点构成的。
解决方案
在游戏中，噪音图非常有用，尤其是对于形成天然图案来说。图
6-8
就是一个噪声
图的例子。
图
6
-
8
：一个噪声纹理
216
｜
第
6
章
要生成一个由噪声构成的
SKTexture
对象，需要使用
SKTexture(noiseWithSmooth
ness:, size, grayScale)
函数。你可以用一个
sprite
，加上其他参数来使用噪声图，
例如：
let noiseTexture = SKTexture(noiseWithSmoothness: 0.2,
size: CGSize(width: 200, height: 200), grayscale: true)
let noiseSprite ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.